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Silver Hake: QA/QC Exercise Results

Results of the QA/QC exercises for ageing silver hake.

Silver Hake, Merluccius bilinearis

Image
Left-facing side profile illustration of silver hake fish with yellow eye and mouth open. Credit: NOAA Fisheries/Jack Hornady

Christine Kircun (CK) has been working with Silver Hake since 2011. Sectioned otoliths are viewed with reflected light.

In tests where agreement is below 90%, bias indicates either the P-value of a symmetry test or ‘n/s’ (test not significant at the α = 0.05 level). The Evans & Hoenig test was used to test bias starting 1/2022; prior to that, a Bowker's test was used.

Sample Source Test Type Date Completed Age Reader Number Aged Number Tested CV (%) Agree-ment (%) Bias
2023 Commercial Samples (Q2) Precision 11/2023 CK 514 67 0.60 97.0  
2023 Spring Survey (202302) Precision 7/2023 CK 382 70 2.85 90.0  
2023 Commercial Samples (Q1) Precision 6/2023 CK 160 41 0.77 95.1  
2022 Autumn Survey (202204) Precision 6/2023 CK 612 100 1.64 94.0  
2022 Commercial Samples (Q4) Precision 5/2023 CK 504 64 4.00 90.6  
2022 Commercial Samples (Q3) Precision 4/2023 CK 574 74 0.27 98.6  
2022 Commercial Samples (Q2) Precision 1/2023 CK 478 86 0.77 95.3  
2022 Spring Survey (202202) Precision 12/2022 CK 1265 100 0.97 96.0  
2022 Commercial Samples (Q1) Precision 10/2022 CK 305 40 0.00 100.0  
2021 Autumn Survey (202104) Precision 7/2022 CK 561 55 6.48 85.5 n/s
2021 Commercial Samples (Q4) Precision 6/2022 CK 580 60 0.73 96.7  
2021 Commercial Samples (Q3) Precision 6/2022 CK 264 40 4.66 85.0 n/s
2021 Commercial Samples (Q2) Precision 6/2022 CK 303 40 2.12 92.5  
2021 Spring Survey (202102) Precision 12/2021 CK 1250 100 2.89 90.0  
2021 Commercial Samples (Q1) Precision 11/2021 CK 692 62 0.00 100.0  
2020 Spring Survey (202002) Precision 5/2021 CK 242 50 0.00 100.0  
2020 Commercial Samples (Q4) Precision 5/2021 CK 954 100 0.28 99.0  
2020 Commercial Samples (Q3) Precision 1/2021 CK 621 70 1.57 95.7  
2020 Commercial Samples (Q2) Precision 12/2020 CK 599 55 0.00 100.0  
2020 Commercial Samples (Q1) Precision 9/2020 CK 460 58 0.00 100.0  
2019 Commercial Samples (Q4) Precision 4/2020 CK 542 43 2.85 93.0  
2019 Autumn Survey (201904) Precision 3/2020 CK 1126 100 2.45 96.0  
2019 Commercial Samples (Q3) Precision 2/2020 CK 548 100 2.72 90.0  
2019 Commercial Samples (Q2) Precision 12/2019 CK 498 76 1.17 94.7  
2019 Spring Survey (201902) Precision 11/2019 CK 1305 100 2.21 93.0  
2019 Commercial Samples (Q1) Precision 10/2019 CK 912 70 0.00 100.0  
2018 Commercial Samples (Q4) Precision 8/2019 CK 713 82 4.63 85.4 n/s
2018 Commercial Samples (Q3) Precision 7/2019 CK 862 100 2.49 88.0 n/s
2018 Autumn Survey (201804) Precision 2/2019 CK 514 69 1.09 97.1  
2018 Commercial Samples (Q2) Precision 2/2019 CK 774 98 1.12 94.9  
2018 Commercial Samples (Q1) Precision 8/2018 CK 695 74 0.00 100.0  
2018 Spring Survey (201802) Precision 7/2018 CK 841 94 1.00 97.9  
2017 Autumn Survey (201704) Precision 5/2018 CK 394 78 0.42 97.4  
2017 Commercial Samples (Q4) Precision 5/2018 CK 471 88 0.41 97.7  
2017 Commercial Samples (Q3) Precision 4/2018 CK 700 93 1.64 93.5  
2017 Spring Survey (201702) Precision 3/2018 CK 1341 88 1.21 95.5  
2017 Commercial Samples (Q2) Precision 2/2018 CK 549 89 2.30 89.9 n/s
2017 Commercial Samples (Q1) Precision 1/2018 CK 839 89 1.57 94.4  
2016 Autumn Survey (201604) Precision 12/2017 CK 838 89 2.06 93.3  
2016 Commercial Samples (Q4) Precision 12/2017 CK 560 68 1.82 94.1  
2016 Commercial Samples (Q3) Precision 12/2017 CK 625 85 3.13 88.2 n/s
2016 Commercial Samples (Q2) Precision 11/2017 CK 808 83 0.91 95.2  
2016 Spring Survey (201602) Precision 11/2017 CK 1802 90 0.57 96.7  
2016 Commercial Samples (Q1) Precision 3/2017 CK 1100 91 2.12 90.1  
2015 Autumn Survey (201504) Precision 11/2016 CK 1319 93 1.92 91.4  
2015 Commercial Samples (Q4) Precision 9/2016 CK 656 88 2.17 93.2  
2015 Commercial Samples (Q3) Precision 8/2016 CK 675 99 1.85 91.9  
2015 Commercial Samples (Q2) Precision 6/2016 CK 757 95 2.25 90.5  
2015 Spring Survey (201502) Precision 12/2015 CK 1481 91 1.95 92.3  
2015 Commercial Samples (Q1) Precision 11/2015 CK 990 93 0.69 96.8  
2014 Commercial Samples (Q4) Precision 5/2015 CK 476 87 2.56 92.0  
2014 Autumn Survey (201404) Precision 4/2015 CK 1161 101 1.68 96.0  
2014 Spring Survey (201402) Precision 10/2014 CK* 1440 97 1.90 91.8  
2013 Autumn Survey (201304) Precision 2/2014 CK* 1101 99 2.49 92.9  
2013 Spring Survey (201302) Precision 1/2014 CK* 1297 100 2.03 91.0  
2012 Spring Survey (201202) Precision 1/2014 CK* 1451 100 1.99 93.0  
2012 Autumn Survey (201204) Precision 11/2013 CK* 1246 99 5.25 86.9 n/s
2011 Autumn Survey (201105) Precision 8/2013 CL 1089 99 3.05 92.9  
2011 Spring Survey (201102) Precision 12/2011 CL 1176 100 2.16 91.0  
2010 Autumn Survey (201004) Precision 7/2011 CL 934 109 6.28 86.2 n/s
2006 Spring Survey (200604) Precision 10/2010 LDW 769 134 2.05 92.5  
2005 Autumn Survey (200510) Precision 10/2010 LDW 717 117 2.91 93.2  
2004 Spring Survey (200402) Precision 10/2005 KL vs. NS 1076 99 5.21 76.8 0.002
2004 Spring Survey (200402) Precision 10/2005 KL 1076 99 1.83 91.9  

 

*CL married to become CK in late 2013.

Last updated by Northeast Fisheries Science Center on November 07, 2023

Age and Growth